MINOR: server: Add QUIC definitions to servers.

This patch adds QUIC structs to server struct so that to make the QUIC code
compile. Also initializes the ebtree to store the connections by connection
IDs.
diff --git a/include/haproxy/server-t.h b/include/haproxy/server-t.h
index 0e66be6..512489a 100644
--- a/include/haproxy/server-t.h
+++ b/include/haproxy/server-t.h
@@ -41,6 +41,7 @@
 #include <haproxy/stats-t.h>
 #include <haproxy/task-t.h>
 #include <haproxy/thread-t.h>
+#include <haproxy/xprt_quic-t.h>
 
 
 /* server states. Only SRV_ST_STOPPED indicates a down server. */
@@ -329,6 +330,10 @@
 		int alpn_len;                   /* ALPN protocol string length */
 #endif
 	} ssl_ctx;
+#ifdef USE_QUIC
+	struct quic_transport_params quic_params; /* QUIC transport parameters */
+	struct eb_root cids;        /* QUIC connections IDs. */
+#endif
 #endif
 	struct dns_srvrq *srvrq;		/* Pointer representing the DNS SRV requeest, if any */
 	struct {
diff --git a/src/server.c b/src/server.c
index 15d88de..8df763b 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1742,6 +1742,9 @@
 	srv->agent.server = srv;
 	srv->agent.proxy = proxy;
 	srv->xprt  = srv->check.xprt = srv->agent.xprt = xprt_get(XPRT_RAW);
+#if defined(USE_QUIC)
+	srv->cids = EB_ROOT_UNIQUE;
+#endif
 
 	srv->extra_counters = NULL;